EP1574784B1 - roller grate - Google Patents

roller grate Download PDF

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Publication number
EP1574784B1
EP1574784B1 EP20050005107 EP05005107A EP1574784B1 EP 1574784 B1 EP1574784 B1 EP 1574784B1 EP 20050005107 EP20050005107 EP 20050005107 EP 05005107 A EP05005107 A EP 05005107A EP 1574784 B1 EP1574784 B1 EP 1574784B1
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EP
European Patent Office
Prior art keywords
roller
grate
scraper mounting
rollers
cooling channels
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Application number
EP20050005107
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German (de)
French (fr)
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EP1574784A1 (en
Inventor
Bernhard Dr. Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Inova Steinmueller GmbH
Original Assignee
Steinmueller Babcock Environment GmbH
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Publication of EP1574784A1 publication Critical patent/EP1574784A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H9/00—Revolving-grates; Rocking or shaking grates
    • F23H9/02—Revolving cylindrical grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H15/00—Cleaning arrangements for grates; Moving fuel along grates

Definitions

  • the invention relates to a Walzenabstreifnam and a roller grate for operating a combustion system, in particular a waste incineration with a spaced axially parallel juxtaposed rotating rollers existing grate for the combustion, wherein the rollers gas passage openings for the introduction of air and / or gas into the combustion chamber or the Have combustion and between the adjacent rolls a gap is met, are provided in the wiper, which are mounted on a arranged below the gap Abstreifnum.
  • the scrapers which are usually made of scrap iron, serve to prevent or minimize slippage of combustion material through the spaces between the rollers.
  • the grate rollers of such roller grates have a roll shell formed from grate bars.
  • the allocation of the primary combustion air is carried out for each grate roller separately via air supply channels in the ash funnel, which are arranged below the roller grate.
  • the combustion air flows through the slots between the grate bars from below through the roller body and leaves this at the top also by slots between the grate bars.
  • Scrapers arranged in the storage spaces ensure that the grate bars are cleaned from buildup due to slag formation. Such scrapers are rigid and can be provided with brushes ( EP 01 57 920 ).
  • the object of the present invention is therefore to provide a roller grate, which avoids these disadvantages mentioned and prevents inadmissible thermal expansion of the scraper and Abstreifiva or reduced so that in this respect no malfunction of the roller grate are to be expected. According to the invention, this object is solved by the features of claims 1 and 5. Further advantageous embodiments of the invention are the subject of the respective dependent claims.
  • the invention includes a roller grate and a Walzenabstreifiva for a roller grate for operating an incinerator, in particular a waste incineration plant, wherein the roller grate from a spaced axially parallel juxtaposed rotating grate rollers existing conveyor grate for the Verbrgut is formed. Between the adjacent rolls a gap is maintained, are provided in the Walzenabstreifer, which are connected to the arranged below the gap Walzenabstreifja.
  • the roll strip carrier is designed to be coolable and to this end advantageously provided with means for applying a cooling medium.
  • the Abstreifzel is provided with cooling channels.
  • the cooling channels are arranged in the upper region of the Abstreifhers over its entire width.
  • the cooling channels are connected according to a further preferred feature of the invention with supply and return lines for the cooling medium.
  • the gap between the wipers and the rollers during assembly can be reduced by adjusting the wiper iron, whereby a reduced rust diameter and an improved primary air distribution is achieved.
  • roller grate is shown with a spaced axially parallel juxtaposed rotating grate rollers 1 existing conveyor grate for the combustion, wherein between the adjacent rolls 1, a gap is met, in which the Walzenabstreifer 2 are provided, which is connected to a arranged below the gap Walzenabstreifnam 3
  • the roller grate is preferably suitable for operating a combustion system, in particular a waste incineration plant.
  • the Abstreifpound 3 is coolable and provided with means for applying a cooling medium.
  • cooling channels 4 are provided over its entire width, which are connected to the supply and return lines 6, 7 for the cooling medium.
  • cooling medium cooling water is preferably used.
  • the cooling channels 4 can be acted upon only during the startup of the system or during the entire operation of the system with a cooling medium.
  • a cooling medium water is preferably used.
  • FIG. 2 a Walzenabstreifcum 3 is shown in section.
  • the cooling channels 4 are formed here over the entire width of the Abstreifnums 3.
  • On the sides of the supply and return lines 6, 7 are arranged for the cooling medium. The flow reversal takes place on the opposite side.
  • the two cooling channels 4 each have separate supply and return lines, which can be cooled both in DC and in countercurrent.
  • the supply and return lines can be provided in the middle of the Abstreifja, with the flow reversal can be done on both sides. It is also possible to provide only the supply or return line in the middle and rear or supply lines to arrange on both sides.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Description

Die Erfindung betrifft einen Walzenabstreifträger und einem Walzenrost zum Betrieb einer Verbrennungsanlage , insbesondere einer Müllverbrennung mit einem aus im Abstand achsparallel nebeneinander angeordneten rotierenden Walzen bestehenden Förderrost für das Verbrennungsgut, wobei die Walzen Gasdurchtrittsöffnungen zur Einleitung von Luft und/oder Gas in den Verbrennungsraum bzw. das Verbrennungsgut aufweisen und zwischen den benachbarten Walzen ein Zwischenraum eingehalten ist, in dem Abstreifer vorgesehen sind, die auf einem unterhalb des Zwischenraums angeordneten Abstreifträger befestigt sind. Die meist aus Schleißeisen bestehenden Abstreifer dienen zur Verhinderung bzw. Minimierung eines Durchrutschens von Verbrennungsgut durch die Zwischenräume zwischen den Walzen.The invention relates to a Walzenabstreifträger and a roller grate for operating a combustion system, in particular a waste incineration with a spaced axially parallel juxtaposed rotating rollers existing grate for the combustion, wherein the rollers gas passage openings for the introduction of air and / or gas into the combustion chamber or the Have combustion and between the adjacent rolls a gap is met, are provided in the wiper, which are mounted on a arranged below the gap Abstreifträger. The scrapers, which are usually made of scrap iron, serve to prevent or minimize slippage of combustion material through the spaces between the rollers.

Die Rostwalzen derartiger Walzenroste ( DE 11 64 014 , DE 3316 363 ) weisen einen aus Roststäben gebildeten Walzenmantel auf. Die Zuteilung der primären Verbrennungsluft erfolgt für jede Rostwalze separat über Luftzuführkanäle in die Aschetrichter, die unterhalb des Walzenrostes angeordnet sind. Die Verbrennungsluft strömt durch die Schlitze zwischen den Roststäben von unten durch den Walzenkörper und verlässt diesen an der Oberseite ebenfalls durch Schlitze zwischen den Roststäben. Zwischen den mit Abstand voneinander angeordneten Rostwalzen befinden sich Stauräume, in denen das Brenngut umgewälzt und mit Verbrennungsluft in Kontakt gebracht wird. In den Stauräumen angeordnete Abstreifer sorgen für Abreinigung der Roststäbe von Anhaftungen infolge Schlackenbildung. Derartige Abstreifer sind starr und können mit Bürsten versehen sein ( EP 01 57 920 ).The grate rollers of such roller grates ( DE 11 64 014 . DE 3316 363 ) have a roll shell formed from grate bars. The allocation of the primary combustion air is carried out for each grate roller separately via air supply channels in the ash funnel, which are arranged below the roller grate. The combustion air flows through the slots between the grate bars from below through the roller body and leaves this at the top also by slots between the grate bars. There are reservoirs between the grate rollers spaced apart from each other in which the fuel is circulated and brought into contact with combustion air. Scrapers arranged in the storage spaces ensure that the grate bars are cleaned from buildup due to slag formation. Such scrapers are rigid and can be provided with brushes ( EP 01 57 920 ).

Darüber hinaus sind auch Anlagen bekannt ( DE 44 18 924 ) bei denen sich zwischen benachbarten Rollen Sperrelemente befinden, die ein Durchrutschen des Verbrennungsgutes nach unten verhindern bzw. minimieren. Die Außenkanten dieser Sperrelemente müssen einen gewissen Abstand zu den Rollenoberflächen aufweisen, wobei sie gleichzeitig als Abstreifer für an der Rollenoberfläche angebackenes Verbrennungsgut dienen können.In addition, facilities are also known ( DE 44 18 924 ) in which there are blocking elements between adjacent rollers, which prevent slippage of the combustion material down or minimize. The outer edges of these locking elements must have a certain distance from the roller surfaces, while they can serve as a scraper for baked on the roller surface combustion material at the same time.

Während des Betriebes und insbesondere beim Anfahren herrschen oberhalb (Feuerraumtemperatur) und unterhalb der Walzen (Primärlufttemperatur im Aschetrichter) stark unterschiedliche Temperaturen. Diese Temperaturdifferenz führt u.a. auch zu unterschiedlichen Temperaturen im Profil der Abstreifträger. Insbesondere führen die höheren Temperaturen im oberen Bereich (zum Feuerraum zugewandte Seite) zu einer thermischen Dehnung der Abstreifträger in Richtung Feuerraum. Dies kann im ungünstigsten Fall zu einer Berührung der Abstreifer mit den Walzen führen und das Drehen der Walzen behindern.During operation and especially during start-up, very different temperatures prevail above (furnace temperature) and below the rollers (primary air temperature in the ash funnel). This temperature difference leads i.a. also at different temperatures in the profile of the Abstreifträger. In particular, the higher temperatures in the upper region (side facing the combustion chamber) lead to a thermal expansion of the scraper carriers in the direction of the combustion chamber. In the worst case, this can lead to a contact of the scrapers with the rollers and hinder the rotation of the rollers.

Die Aufgabe der vorliegenden Erfindung besteht deshalb darin, einen Walzenrost vorzustellen, der diese genannten Nachteile vermeidet und unzulässige thermische Dehnungen der Abstreifer und Abstreifträger verhindert bzw. derart reduziert, daß diesbezüglich keine Funktionsstörungen des Walzenrostes zu erwarten sind. Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 und 5 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der jeweils zugehörigen Unteransprüche.The object of the present invention is therefore to provide a roller grate, which avoids these disadvantages mentioned and prevents inadmissible thermal expansion of the scraper and Abstreifträger or reduced so that in this respect no malfunction of the roller grate are to be expected. According to the invention, this object is solved by the features of claims 1 and 5. Further advantageous embodiments of the invention are the subject of the respective dependent claims.

Demnach beinhaltet die Erfindung einen Walzenrost und einen Walzenabstreifträger für eine Walzenrost zum Betrieb einer Verbrennungsanlage, insbesondere einer Müllverbrennungsanlage, wobei der Walzenrost aus einem im Abstand achsparallel nebeneinander angeordneten rotierenden Rostwalzen bestehenden Förderrost für das Verbrennungsgut gebildet wird. Zwischen den benachbarten Walzen ist ein Zwischenraum eingehalten, in dem Walzenabstreifer vorgesehen sind, die mit dem unterhalb des Zwischenraums angeordneten Walzenabstreifträger verbunden sind. Erfindungsgemäß ist der Walzenabstreifträger kühlbar ausgebildet und dazu vorteilhaft mit Mitteln zur Beaufschlagung mit einem Kühlmedium versehen.Accordingly, the invention includes a roller grate and a Walzenabstreifträger for a roller grate for operating an incinerator, in particular a waste incineration plant, wherein the roller grate from a spaced axially parallel juxtaposed rotating grate rollers existing conveyor grate for the Verbrgut is formed. Between the adjacent rolls a gap is maintained, are provided in the Walzenabstreifer, which are connected to the arranged below the gap Walzenabstreifträger. According to the invention, the roll strip carrier is designed to be coolable and to this end advantageously provided with means for applying a cooling medium.

Nach einem besonders bevorzugten Merkmal der Erfindung ist der Abstreifträger mit Kühlkanälen versehen.According to a particularly preferred feature of the invention, the Abstreifträger is provided with cooling channels.

Vorteilhaft sind die Kühlkanäle im oberen Bereich des Abstreifträgers über dessen gesamte Breite angeordnet.Advantageously, the cooling channels are arranged in the upper region of the Abstreifträgers over its entire width.

Die Kühlkanäle sind nach einem weiteren bevorzugten Merkmal der Erfindung mit Vor- und Rücklaufleitungen für das Kühlmedium verbunden. Mit der vorliegenden Erfindung wird ein ausgeglicheneres Temperaturprofil bezogen auf den Querschnitt des Walzenabstreifträgers erreicht. Dadurch wird die Gefahr einer thermischen Verformung des Walzenabstreifträgers in Richtung Feuerraum minimiert. Das hat zur Folge, daß dadurch die Berührung der Walzenabstreifer mit den rotierenden Walzen und damit die Behinderung des Drehen der Walzen erfolgreich vermieden werden kann.The cooling channels are connected according to a further preferred feature of the invention with supply and return lines for the cooling medium. With the present invention, a more balanced temperature profile based on the cross section of the Walzenabstreifträgers is achieved. As a result, the risk of thermal deformation of the Walzenabstreifträgers is minimized towards the combustion chamber. That has to Consequence, that thereby the contact of the Walzenabstreifer with the rotating rollers and thus the obstruction of the rotation of the rollers can be successfully avoided.

Weiter kann durch die erfindungsgemäße Maßnahme der Spalt zwischen den Abstreifern und den Walzen bei der Montage durch Justieren der Schleißeisen verringert werden, wodurch ein verringerter Rostdurchfall und eine verbesserte Primärluftverteilung erreicht wird.Further, by the measure according to the invention, the gap between the wipers and the rollers during assembly can be reduced by adjusting the wiper iron, whereby a reduced rust diameter and an improved primary air distribution is achieved.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend näher erläutert. Es zeigen:

Figur 1:
zwei angedeutete aufeinander folgende Rostwalzen eines Walzenrostes mit dazwischen angeordneten Walzenabstreifträger und Walzenabstreifern im Querschnitt,
Figur 2:
einen Walzenabstreifträger mit Kühlmitteln in Schnittdarstellung.
An embodiment of the invention is illustrated in the drawing and will be explained in more detail below. Show it:
FIG. 1:
two indicated successive grate rollers of a roller grate with Walzenabstreifträger and Walzenabstreifern arranged therebetween in cross section,
FIG. 2:
a Walzenabstreifträger with coolants in section.

In der Figur 1 ist ein Walzenrost mit einem aus im Abstand achsparallel nebeneinander angeordneten rotierenden Rostwalzen 1 bestehenden Förderrost für das Verbrennungsgut dargestellt, wobei zwischen den benachbarten Walzen 1 ein Zwischenraum eingehalten ist, in dem die Walzenabstreifer 2 vorgesehen sind, die mit einem unterhalb des Zwischenraums angeordneten Walzenabstreifträger 3 verbunden sind- Der Walzenrost ist vorzugsweise zum Betrieb einer Verbrennungsanlage, insbesondere einer Müllverbrennungsanlage geeignet. Die meist aus Schleißeisen bestehenden Abstreifer 2 dienen zur Verhinderung bzw. Minimierung des Durchrutschens von Verbrennungsgut durch die Zwischenräume zwischen den Walzen 1.In the FIG. 1 a roller grate is shown with a spaced axially parallel juxtaposed rotating grate rollers 1 existing conveyor grate for the combustion, wherein between the adjacent rolls 1, a gap is met, in which the Walzenabstreifer 2 are provided, which is connected to a arranged below the gap Walzenabstreifträger 3 The roller grate is preferably suitable for operating a combustion system, in particular a waste incineration plant. The scrapers 2, which are usually made of scrap iron, serve to prevent or minimize slippage of combustion material through the intermediate spaces between the rollers 1.

Der Abstreifträger 3 ist kühlbar ausgebildet und dazu mit Mitteln zur Beaufschlagung mit einem Kühlmedium versehen.The Abstreifträger 3 is coolable and provided with means for applying a cooling medium.

Im oberen Bereich des Abstreifträgers 3 sind dazu über dessen gesamte Breite Kühlkanäle 4 vorgesehen, die mit Vor- und Rücklaufleitungen 6, 7 für das Kühlmedium verbunden sind. Als Kühlmedium wird vorzugsweise Kühlwasser verwendet.In the upper region of the Abstreifträgers 3 cooling channels 4 are provided over its entire width, which are connected to the supply and return lines 6, 7 for the cooling medium. As the cooling medium, cooling water is preferably used.

Die Kühlkanäle 4 können nur während des Anfahrens der Anlage oder auch während des gesamten Betriebes der Anlage mit einem Kühlmedium beaufschlagt werden. Als Kühlmedium wird bevorzugt Wasser verwendet.The cooling channels 4 can be acted upon only during the startup of the system or during the entire operation of the system with a cooling medium. As the cooling medium, water is preferably used.

In der Figur 2 ist ein Walzenabstreifträger 3 im Schnitt dargestellt. Die Kühlkanäle 4 sind hier über die gesamte Breite des Abstreifträgers 3 ausgebildet. An den Seiten sind die Vor- und Rücklaufleitungen 6, 7 für das Kühlmedium angeordnet. Die Strömungsumkehr erfolgt auf der gegenüberliegenden Seite.In the FIG. 2 a Walzenabstreifträger 3 is shown in section. The cooling channels 4 are formed here over the entire width of the Abstreifträgers 3. On the sides of the supply and return lines 6, 7 are arranged for the cooling medium. The flow reversal takes place on the opposite side.

Für die Einspeisung des Kühlmediums sind verschiedene Varianten möglich. Es ist möglich, daß die beiden Kühlkanäle 4 über jeweils separate Vor- und Rücklaufleitungen verfügen, wobei sowohl im Gleichstrom als auch im Gegenstrom gekühlt werden kann.For the feeding of the cooling medium different variants are possible. It is possible that the two cooling channels 4 each have separate supply and return lines, which can be cooled both in DC and in countercurrent.

Weiter können beispielsweise die Vor- und Rücklaufleitungen in der Mitte der Abstreifträger vorgesehen werden, wobei auf beiden Seiten die Strömungsumkehr erfolgen kann. Es ist auch möglich lediglich die Vor- oder Rücklaufleitung in der Mitte vorzusehen und Rück- bzw. Vorlaufleitungen auf beiden Seiten anzuordnen.Further, for example, the supply and return lines can be provided in the middle of the Abstreifträger, with the flow reversal can be done on both sides. It is also possible to provide only the supply or return line in the middle and rear or supply lines to arrange on both sides.

Claims (5)

  1. A roller scraper mounting for a roller grate for operation of an incineration plant, wherein the roller scraper mounting (3) is coolable and equipped with means (4, 6, 7) for application of a cooling medium, characterized in that the roller scraper mounting (3) is equipped with cooling channels (4).
  2. The roller scraper mounting according to claim 1, characterized in that the cooling channels (4) are disposed in the upper area of the scraper mounting (3) along its entire width.
  3. The roller scraper mounting according to one of the afore-mentioned claims, characterized in that the cooling channels (4) are connected to feed conduits and return conduits (6, 7) for the cooling medium.
  4. The roller scraper mounting according to one of the afore-mentioned claims, characterized in that the cooling channels (4) have a flow reversal system.
  5. A roller grate for operating an incineration plant, more specifically a waste incineration plant, with a conveyor grate for the material to be incinerated consisting of spaced-apart rotating grate rollers (1) disposed next to each other with their axes running parallel to each other, wherein an intermediate space is maintained between the adjacent rollers (1), in which roller scrapers (2) are provided, which are connected to a roller scraper mounting (3) according to claims 1 to 4 disposed under the intermediate space.
EP20050005107 2004-03-09 2005-03-09 roller grate Active EP1574784B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410011834 DE102004011834A1 (en) 2004-03-09 2004-03-09 roller grate
DE102004011834 2004-03-09

Publications (2)

Publication Number Publication Date
EP1574784A1 EP1574784A1 (en) 2005-09-14
EP1574784B1 true EP1574784B1 (en) 2015-04-29

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ID=34813652

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Application Number Title Priority Date Filing Date
EP20050005107 Active EP1574784B1 (en) 2004-03-09 2005-03-09 roller grate

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DE (1) DE102004011834A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2045115A (en) * 1930-07-03 1936-06-23 John E Allen Refuse destructor
FR1286528A (en) * 1961-04-21 1962-03-02 Stadt Duesseldorf Household waste incineration plant
DE1164014B (en) * 1962-05-25 1964-02-27 Ver Kesselwerke Ag Grate roller for roller grate for waste incineration
DE3316363A1 (en) * 1983-05-05 1984-11-08 Deutsche Babcock Anlagen Ag, 4200 Oberhausen ROLLER GRID FOR WASTE COMBUSTION PLANTS
DE3420020A1 (en) * 1983-12-23 1985-07-04 Müllverbrennungsanlage Wuppertal GmbH, 5600 Wuppertal RUST BAR AND RUST ROLLER FOR THE ROLL GRID e.g. A WASTE COMBUSTION PLANT OR THE LIKE
US5027719A (en) * 1990-02-28 1991-07-02 Wellons, Inc. Rotary grate for a solid fuel furnace
DE4418924C2 (en) * 1993-01-13 1997-04-24 Rbu Rolf Becker Gmbh Ingenieur Combustion boiler with adjustable sealing elements on a roller grate

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DE102004011834A1 (en) 2005-10-06
EP1574784A1 (en) 2005-09-14

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